The term 'cornfield birds' refers to two species of birds that are commonly found in cornfields: Ravens and CROWS. Ravens are large, black birds with a wingspan of up to 4 feet and a distinctive croaking call. CROWS are smaller than Ravens, but still have a wingspan of up to 3 feet, and they are known for their loud cawing. Both species are omnivorous, meaning they eat both plants and animals, and they are often seen scavenging for food in cornfields.